Kotler, P., & Armstrong, G. (2001). Principles of marketing (9th ed.). Prentice-Hall of India.
Cita Chicago (17th ed.)Kotler, Philip, i Gary Armstrong. Principles of Marketing. 9th ed. New Delhi: Prentice-Hall of India, 2001.
Cita MLA (9th ed.)Kotler, Philip, i Gary Armstrong. Principles of Marketing. 9th ed. Prentice-Hall of India, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.